On my 416Play using DSM 7 RC I have tried to use a normal SATA SSD installed in Bay 4 as a read cache however at the step in 8:56 I have a very different options on my screen. It says it is detected, however the options under "MANAGE STORAGE POOL" are: 1. Add Drive For Storage Expansion 2. Replace Drive 3. Change RAID type 4. Assign as hot spare Under "CREATE STORAGE POOL" the only option is "Create Storage Pool". NO create SSD cache. I suspect DSM 7 has removed the ability for us to use the normal drive bays for SSD caching and they are locking us into only using it if the system has M.2. This worries me as I have an 1819+ running DSM 6.2 very happily with an SSD acting as the cache drive in Bay 8. I dread that upgrading my main NAS to DSM 7 is going to force me into buying the EXCEEDINGLY PRICEY Synology branded M.2 adapter card for it. If you do a video showing that you are able to add an SSD cache using one of the normal drive bays? This will either confirm my findings, or show my 416Play is simply snaffued. Thank you.
I have two 2TB SSD Cache Cards installed, and it only allowed me to bring one online. When I tried configuring the second one, a box came up that said "The volume is already mounted with an SSD cache".
The way you could have tested it is real-world application tests. Using, say, Synology Universal Search and than searching for a bunch of files on largely populated disk, in order to see if search times are getting better as index is getting cached. Secondly, you could have VMs, and then measure if the (OS) boot time improves if you boot them multiple times as the whole VM disk image would get cached. I think the latter could have easily stand out if cache is really efficient. Just a few ideas...
Configure a read/write cache. When the benchmark executes the writes should hit the cache. Whether they stay hot in cache after they flush to disk, and can be read back from is another question. It will depend on how specifically the cache mechanism is implemented in DSM 7.
Would be great if we could chose which folders to cache. In my case I would like Synology drive to be used in my SSD cache but it sometimes chooses some movies and stuff which don’t need the speed at all
@@SpaceRexWill educated guess. I share an Emby server with friends and Emby is extremely quick specially with popular movies or shows. I could be wrong but only I use Synology Drive. Smaller files that I look for once in a while take some time to load and when I want to move some files it takes a bit. That’s why if I could pick what to use in the cache I would just chose the folders in my Synology drive
I think you could be right as streaming a movie would just grabs smaller chunks of a movie and streams them over the network across a longer period. I'm not familiar with DSM7 enough but I know DSM6 the "Skip sequential I/O" option is turned on by default, however I think when streaming a larger file DSM could assume it is not accessed in a sequential matter and therefor it puts the file (or chunks of it) in its SSD cache
How do you think this would go with say a NAS based photo library of Raw files, connected to a macbook that's editing the photos in lightroom, constantly going back and forth between the photos again and again. Are the file sizes too large to benefit from the cache?
Totally depends on your workflow. If you are doing stuff with sequential writes and reads, not at all. If you are running stuff with random IOPS it could help a ton.
It's quite disappointing that you can set a SSD cache only for one volume, even if you have 2 SSDs installed or leave space empty on the SSDs. So choose wisely, what you want to cache.
You are at the limit of the 1gig connection until you go to 2.5gb or 10gb cache drives will not help that NAS you are testing with. What will help is a ton of small files or seek times to find files. Disk benchmark apps usally don’t test multi small file transfers. If you can get multi 1gig connection cache drives will help that. Create a LACP with 2 nicks can improve your test but only when you benchmark with 2 computers. Not sure of your nas supports multichannel SMB but that could help I know on Qnap this helps.
So if I’m using 1 gigabit Ethernet (home use, with 2 users) it sounds like using an NVME cache wouldn’t help, right? Would using WD Red drives with onboard cache be good enough?
With 1 gig Ethernet honestly any spinning disks will be fine (speed wise) not a bad idea to get NAS drives. But if you do choose to go WD check and make sure that the drives you are getting are CMR not SMR. There is a ton of info online
@@SpaceRexWill thank you for pointing that out. I bought the WD Red Pro drives today from Amazon and they specifically labeled them as CMR in multiple places. I’ll skip the NVME cache for now. I also bought the DS920+ from NewEgg as it was only $50 more than the DS420+. Going from 2 to 4 cores and the extra memory seemed worth it to me.
On my 416Play using DSM 7 RC I have tried to use a normal SATA SSD installed in Bay 4 as a read cache however at the step in 8:56 I have a very different options on my screen. It says it is detected, however the options under "MANAGE STORAGE POOL" are:
1. Add Drive For Storage Expansion 2. Replace Drive
3. Change RAID type 4. Assign as hot spare
Under "CREATE STORAGE POOL" the only option is "Create Storage Pool". NO create SSD cache.
I suspect DSM 7 has removed the ability for us to use the normal drive bays for SSD caching and they are locking us into only using it if the system has M.2. This worries me as I have an 1819+ running DSM 6.2 very happily with an SSD acting as the cache drive in Bay 8. I dread that upgrading my main NAS to DSM 7 is going to force me into buying the EXCEEDINGLY PRICEY Synology branded M.2 adapter card for it.
If you do a video showing that you are able to add an SSD cache using one of the normal drive bays? This will either confirm my findings, or show my 416Play is simply snaffued.
Thank you.
真不错，为了看你的视频我去学英语。alsome videos you made! I learn English because of u
I have two 2TB SSD Cache Cards installed, and it only allowed me to bring one online. When I tried configuring the second one, a box came up that said "The volume is already mounted with an SSD cache".
same
The way you could have tested it is real-world application tests. Using, say, Synology Universal Search and than searching for a bunch of files on largely populated disk, in order to see if search times are getting better as index is getting cached. Secondly, you could have VMs, and then measure if the (OS) boot time improves if you boot them multiple times as the whole VM disk image would get cached. I think the latter could have easily stand out if cache is really efficient. Just a few ideas...
Configure a read/write cache.
When the benchmark executes the writes should hit the cache. Whether they stay hot in cache after they flush to disk, and can be read back from is another question. It will depend on how specifically the cache mechanism is implemented in DSM 7.
Would be great if we could chose which folders to cache. In my case I would like Synology drive to be used in my SSD cache but it sometimes chooses some movies and stuff which don’t need the speed at all
How can you tell what is in the SSD cache? Generally it’s designed to put the info you are using most often
@@SpaceRexWill educated guess. I share an Emby server with friends and Emby is extremely quick specially with popular movies or shows. I could be wrong but only I use Synology Drive. Smaller files that I look for once in a while take some time to load and when I want to move some files it takes a bit. That’s why if I could pick what to use in the cache I would just chose the folders in my Synology drive
I think you could be right as streaming a movie would just grabs smaller chunks of a movie and streams them over the network across a longer period. I'm not familiar with DSM7 enough but I know DSM6 the "Skip sequential I/O" option is turned on by default, however I think when streaming a larger file DSM could assume it is not accessed in a sequential matter and therefor it puts the file (or chunks of it) in its SSD cache
Will DSM 7 support SATA SSDs also or just M.2 SSDs?
How do you think this would go with say a NAS based photo library of Raw files, connected to a macbook that's editing the photos in lightroom, constantly going back and forth between the photos again and again. Are the file sizes too large to benefit from the cache?
Maybe try copying over a large folder with tons of small files. Like a wordpress installation with tons of plugins.
Could you possibly make a video with same setup with ssd set for read and write cache? I'd really like to see that
Yeah I have been meaning to! You can get much worse performance for massive writes with a write cache as it will saturate the drive
@@SpaceRexWillIs a write even advised then? If I have two, is it better to just make them both read?
Do I need to use an SSD built for NAS/Enterprise (eg Seagate IronWolf 510), or can I use a consumer SSD?
the question is: can i install DSM on 2.5 ssd? and then use hdd for storage?
Does having 1 ssd drive on a ds920+ help at all on a 1gbps network or not really? Thank you for any response!
Totally depends on your workflow. If you are doing stuff with sequential writes and reads, not at all. If you are running stuff with random IOPS it could help a ton.
It's quite disappointing that you can set a SSD cache only for one volume, even if you have 2 SSDs installed or leave space empty on the SSDs. So choose wisely, what you want to cache.
You are at the limit of the 1gig connection until you go to 2.5gb or 10gb cache drives will not help that NAS you are testing with. What will help is a ton of small files or seek times to find files. Disk benchmark apps usally don’t test multi small file transfers. If you can get multi 1gig connection cache drives will help that. Create a LACP with 2 nicks can improve your test but only when you benchmark with 2 computers. Not sure of your nas supports multichannel SMB but that could help I know on Qnap this helps.
So if I’m using 1 gigabit Ethernet (home use, with 2 users) it sounds like using an NVME cache wouldn’t help, right? Would using WD Red drives with onboard cache be good enough?
With 1 gig Ethernet honestly any spinning disks will be fine (speed wise) not a bad idea to get NAS drives. But if you do choose to go WD check and make sure that the drives you are getting are CMR not SMR. There is a ton of info online
@@SpaceRexWill thank you for pointing that out. I bought the WD Red Pro drives today from Amazon and they specifically labeled them as CMR in multiple places. I’ll skip the NVME cache for now. I also bought the DS920+ from NewEgg as it was only $50 more than the DS420+. Going from 2 to 4 cores and the extra memory seemed worth it to me.
i put 2 500GB m.2 ssd but now the cache is using like 8gb of ram and only leaving like 1gb of free ram. does anybody have any idea ??
That 8 gig of cache is actually ram cache. Any unused ram on your NAS is used to cache files for faster speed
@@SpaceRexWill thanks
DSM 7 disabled SSD caching for sequential reads which makes it impossible to saturate a 10gbe for single user. Extremely annoying for video editing.
still no support for SSD cache for multiple volumes?
I think it came out in 7.1
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